245321129 has 2 divisors, whose sum is σ = 245321130. Its totient is φ = 245321128.

The previous prime is 245321123. The next prime is 245321143. The reversal of 245321129 is 921123542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211993600 + 33327529 = 14560^2 + 5773^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245321129 is a prime.

It is not a weakly prime, because it can be changed into another prime (245321123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122660564 + 122660565.

It is an arithmetic number, because the mean of its divisors is an integer number (122660565).

Almost surely, 2^245321129 is an apocalyptic number.

It is an amenable number.

245321129 is a deficient number, since it is larger than the sum of its proper divisors (1).

245321129 is an equidigital number, since it uses as much as digits as its factorization.

245321129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 245321129 is about 15662.7305729237. The cubic root of 245321129 is about 626.0057441113.

The spelling of 245321129 in words is "two hundred forty-five million, three hundred twenty-one thousand, one hundred twenty-nine".